Device for sharpening lawn-mowers.



c. c. RAYL. DEVIUE FOR SHARPENING LAWN MOWERS.

' APPLICATION FILED SEPT. 25, 1909 9418,9623, Patented F.eb.8,1910

CLAUDE C. RAYL, 0F MONROE, INDIANA.

DEVICE FOR SHARPENING LAWN-MOWERS.

Specification of Letters Patent.

Application filed September 25, 1909. Serial No. 519,603.

To all whom it may concern:

- Be it known that I, CLAUDE C. RAYL, a citizen of the United States ofAmerica, residing at Monroe, in the county of Adams 0 and State ofIndiana, have invented certain new and useful Improvements in Devicesfor Sharpening Lawn-Mowers, of which the following is a specification,reference being had therein to the accompanying drawing.

This invention relates to lawn mowers, and the principal object of thesame is to provide a sharpening attachment therefor which may beadjusted relative to the cutting edges .of the knives, and which may bekept on the machine if desired so that the mower will beself-sharpening, or may be detached therefrom.

In carrying out the objects of the invention generally stated above itis contemplated providing the frame of themower with seats or guidewaysin which the supports for the sharpener are adapted to be adjustablymounted, said supports *beingprovided with end seats in which thesharpc'ner is yieldingly mounted so that the shock incidental to thecontact of the cutting blades withthe abrasive surface of the sharpenerwill be absorbed.

The invention also contemplates a novel structure of sharpener-theabrasive surface of which conforms to the arc of the circle traversed bythe cutting blades and the ends of which are adapted for a snug butyielding fit within the end seats of the supports, so that the sharpenermay be removed without removing the supportsfrom the mower.

It will be understood, of course, that in the practical application ofthe invention, the essential features of the same are necessarilysusceptibleof changes in details and structural arrangements, onepreferred and prac-' tical embodiment of which is shown in theaccompanying drawings, wherein- I Figure 1 1s a central verticalsectional view of a lawn mower showing the same equipped with theimproved sharpening device. Fig. 2 is a detail perspective view of thesharpener, its supports being indicated by dotted lines. Fig-3 is adetail perspec tive view of .one of the supports for the sharpener, oneend of a sharpener being shown supported thereby. Fig. 4 is afragmentary perspective view of one of the supports showing in detailthe seat at one end 5 thereof. Fig. 5is a vertical view taken bn theline 55, Fig. 1.

In the accompanying drawings but one end of a lawn mower has been shown,but itis to be understood that both ends are duplicates and hence it isthought that a detailed description of the end shown will sutfice for aclear understanding of both ends.

Referring to said drawings by numerals, l designates the end frames ofthe mower in which the axle 2 for the wheels 3 is n1ounted and also inwhich the shaft 4 for the knives 4. The usual handle 5 is connected tothe frames, as is also the roller 6. Ata point in advance of the knives4, each frame 1 is provided with horizontally arranged spaced apartparallel shoulders T which provide between them a guideway 8 having atransverse threaded opening 10 formed therein; The supports for theimproved sharpening device are adapted to be adjustably seated in saidguideway 8, each support comprising an arm 11 slidably seated in saidguideway and provided with a central elongated slot 12 through which aset screw 13 mounted in the opening 10 projects and which is adapted tolock said arm in the desired adjusted position in said guideway. Theinner end of each arm carries an upstanding inwardly projecting seat 14,having an open top and inner side and a closed bottom. Said seat ispreferably arranged on an upward inclination relative to its arm so thatthe sharpener supported therein will be retained at the proper "anglerelative to the cutting edge ofthe knives.

The sharpener comprises a fiat base board 15, one wide surface of whichis concaved between its ends, as indicated at 16 and forms a seatfor-the abrasive material 17 which is similarly concaved. The oppositeside of the base board 15 is Hat and its ends are recessed for thereception of blocks of cushioning material 18, such rubber.

As will be understood, the sharpener has its ends placed, in the seats14 with its abrasive surface presented to the cutting edges of theknives, so that when the sharpening device is properly adjusted, thesaid edges will contact therewith and be sharpened, the shock incidentalto the contact of said knives with the abrasive surface being absorbedby the cushioning material which isinterposed between one side of saidseats 14 and the ends of the base board 15. The base board has a snugfit within its seats 14, but may be readilyremovcd therefrom whennecessary-or desirable, and it will also be atented Feb. 8, 1910. i

understood thatthe arms 11 which carry- 1. A sharpener for, lawn mowers,compris ing arms adapted for. adjustable and detachabie engagements witha lawn "mower frame, an upwardly-inclinedintegr 1 end seat carried byeach arm, and a sharpener having cushioned ends removabiy mounted insaid seats.

2. A sharpening attachment if'or lawn eeaeee mowers comprisingsupporting arms having end seats, a sharpener having recessed ends, andcushioning material in said recessed ends, said cushioned ends beingmounted in said seats.

3. A sharpening attachment for lawn mowers, comprising supporting armsadapt ed for detachable and adjustable engagement with a mower frame, anupwardlydnclined, inwardly projecting seat carried by each arm, saidseats having their top and inner side open, and a sharpener having itsend simported by said seats.

"In testimony whereof I hereunto afiix my signature in presence oftwowitnesses.

CLAUDE O. BAYL. Witnesses:

M. F. PAnnIsH, N. H. OLIVER.

